[Debian-med-packaging] Bug#804091: artemis: FTBFS with Java 8: FastVector.sort(Comparator) cannot implement List.sort(Comparator<? super E>)

[Emmanuel Bourg]

Package: artemis
Version: 16.0.0+dfsg-1
Severity: important
User: debian-java at lists.debian.org
Usertags: openjdk-8-transition

Dear Maintainer,

artemis fails to build with OpenJDK 8, there is a conflict with the sort()
method in FastVector and the newly added sort() method in the java.util.List
interface in Java 8 (the return type isn't the same):

    /home/ebourg/packaging/artemis/uk/ac/sanger/artemis/util/FastVector.java:94: error: sort(Comparator) in FastVector cannot implement sort(Comparator<? super E>) in List
      public FastVector sort(final Comparator cmp)
                        ^
      return type FastVector is not compatible with void
      where E is a type-variable:
        E extends Object declared in interface List
    /home/ebourg/packaging/artemis/uk/ac/sanger/artemis/io/KeyVector.java:37: error: sort(Comparator) in FastVector cannot implement sort(Comparator<? super E>) in List
    public class KeyVector extends FastVector
           ^
      return type FastVector is not compatible with void
      where E is a type-variable:
        E extends Object declared in interface List


You can test the build with OpenJDK 8 by installing default-jdk/0.53 from experimental.

Emmanuel Bourg